Fuze

ABSTRACT

A fuze having an electronic arming delay timer, an antidisturbance firing mechanism and a remote firing mechanism, wherein either firing mechanism is capable of causing detonation of a squib.

i l E I United States Patent m1 3,598,056

[72] Inventors Glyl n [50] Field of Search 102/8, 16, Robert H. Forster; Bernard M. Jones, all of l9.2, 70.2 China Lake, Calii. [21) Appl. No. 786,838 r [56] Reierences Cited [22] Filed Dec. 19, 1968 UNITED STATES PATENTS -1 'Pmnwd 1- 3 3,343,493 9/1967 Aulds et a! 102/702 1 a The United of 3,453,406 7/l969 Pope 102/702 x represented by the Secretary of the Navy Primary Exammer-Verlm R. Pendegrass Attorneyr- Edgar J. Brower and Roy Miller ABSTRACT: A fuze having an electronic arming delay timer, 4 Chh'J Dn'hg an antidisturbance firing mechanism and a remote firing [52] US. 102/701 mechanism, wherein either firing mechanism is capable of [5 l 1 Int. C F42c 1 1/06 causing detonation of a squib.

PATENIEDAusmmn 3,598,056

4 H ANTI DISTURBANOE l0 ACTUATION v TIME FIRING DELAY CIRCUIT manor:

SWITCH lli ACTUATION FIG. l.

o n a FIG. 2.

23 I7 2? S Ill r I l 25 l 24 i is i 1 I I T L. 22 I 26 T VI I i 20 l SQUIB I J 7 l3- r I9 I INVENTORS. FIG GAYLON L. WEST ROBERT H. FORSTER BERNARD M. JONES ,BY

ROY MILLER ATTORNEY.

FUZE

GOVERNMENT INTEREST The invention described herein may be manufactured and used by or for the Government of the United States of America for governmental purposes without the payment of any royalties thereon or therefore.

BACKGROUND OF THE INVENTION SUMMARY OF THE INVENTION In accordance with the present invention, an electronii arming timer comprising a resistor and a capacitor is initiated At the conclusion of the arming timing cycle, the capacitor i charged, the fuse is armed and ready for detonation.

Detonation will occur in response to the movement of trembler switch, or in response to the closing of a remott switch.

The trembler switch or remote switch triggers a silicon con trolled rectifier which applies the charge on the capacitor to squib to cause detonation.

BRIEF DESCRIPTION OF THE DRAWING FIG. I is a block diagram of the system;

FIG. 2 is a "time-line" of the operation of the system showr in FIG. I; and

FIG. 3 is a schematic diagram of the electronic circuitry othe system shown in FIG. 1.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 1, upon closing of switch S electronic time delay begins its timing cycle at time 1,, as shown in FIG. 2.

During the time interval from 1,, to 1, time delay 10 operates to charge firing capacitor I8 to a voltagecapableol' firing a squib. Time r,represents the time at which the firing capacitor is fully charged, and the device armed. Firing circuit 13 may be triggered to cause detonation at time !,In response to antidisturbance actuation means I1, or at time l in res onse to remote switch actuation l2.

FIG. 3 is a schematic diagram of the system just prior to time 1,.

To initiate the arming cycle, switch S is closed at time 1,,. Capacitor I8 is charged through resistor 17 so that a voltage approximately equal to V,appears across silicon controlled rectifier 22. The combination of capacitor 18 and resistor 17 forms time delay 10 having a time 'constant equal to the reciprocal of the product of the values of capacitor 18 and resistor I7. Capacitor 14 is charged through resistor 23 so that a voltage approximately equal to V appears across trembler switches 15 and 16 and remote switch 12. Capacitor 26 is charged through resistor 17 so that a voltage approximately equal to V, appears across silicon controlled rectifier 25.

The charge stored by capacitor 14 provides sufficient current to fire silicon controlled rectifier 22through resistor 21 and to fire silicon controlled rectifier 26 through resistor 24. Thus at time 1,, when the fuse is fully armed, the closing of either trembler switch 15 or 16 or remote switch 12 will cause silicon controlled rectifiers 22 applies the voltage stored across capacitor 18 onto squib 19 for detonation.

For testing, squib 19 is removed, and when either trembler switch 15 or 16 or remote switch 12 is closed, silicon controlled rectlfier 25 WIII fire to apply the voltage stored on capacitor 26 to lamp 20, causing it to light, to indicate that the trembler or remote switches, and the electronic circuitry are operating correctly.

Various arming delay times may be selected by adjusting the value of resistor I7 to alter the time constant of time delay 10.

What we claim is: I l. A fuse for detonating a squib or other explosive in response to a disturbance resulting in movement of an actuator or in response to actuation of a remote controlled switch, comprising:

a power supply, an arming switch coupled to said power supply; an electronic time delay coupled to said arming switch to delay arming said fuse for a first interval of time; an antidisturbance actuator consisting of a plurality of trembler switches connected in parallel and coupled to said arming switch, wherein said trembler switches are arranged such that at least one of said trembler switches are arranged such that at least one of said trembler switches will be actuated in response to a disturbance resulting in movement of said trembler switches in any direction; a remote controlled switch connected in parallel with said antidisturbance actuator and coupled to said arming .switch;

a firing circuit coupled to said antidiisturbance actuator and said remote controlled switch; and

testing means for determining whether or not an enabling signal is provided to said firing circuit when said antidisturbance actuator or said remote controlled switch is actuated.

2. The fuse as defined in claim 1 wherein the electronic time delay comprises a resistor and capacitor in combination to form a relaxation oscillator. 1

3. The fuse as defined in claim 1 wherein the antidisturbance means comprises a plurality of trembler switches capable of firing a properly biased silicon controlled rectifier which will detonate the fuse.

4. The fuse of claim 1 wherein said testing means comprises a capacitor, a silicon controlled rectifier, and a lamp.

UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 3,598 ,056 10 August 1971 Gaylon L. W st et a1.

It is certified that error appears in the aboveidentified patent and that said Letters Patent is hereby corrected as shown below:

Column 2, line 1 should be corrected to read: ---silicon controlled rectifiers 22 and 25 to fire. When fired, silicon controlled rectifier 22 applies the voltage stored-L Lines 36 and 37 (CLAIM 1), should be corrected by deleting "are arranged such that at least one of said trembler switches".

Signed and sealed this 25th day of January 1972.

(SEAL) Attest:

EDWARD M.FLETCHER ,JR. ROBERT GOTTS CHALK Attesting Officer sSioner of Patents 

1. A fuse for detonating a squib or other explosive in response to a disturbance resulting in movement of an actuator or in response to actuation of a remote controlled switch, comprising: a power supply, an arming switch coupled to said power supply; an electronic time delay coupled to said arming switch to delay arming said fuse for a first interval of time; an antidisturbance actuator consisting of a plurality of trembler switches connected in parallel and coupled to said arming switch, wherein said trembler switches are arranged such that at least one of said trembler switches will be actuated in response to a disturbance resulting in movement of said trembler switches in any direction; a remote controlled switch connected in parallel with said antidisturbance actuator and coupled to said arming switch; a firing circuit coupled to said antidisturbance actuator and said remote controlled switch; and testing means for determining whether or not an enabling signal is provided to said firing circuit when said antidisturbance actuator or said remote controlled switch is actuated.
 2. The fuse as defined in claim 1 wherein the electronic time delay comprises a resistor and capacitor in combination to form a relaxation oscillator.
 3. The fuse as defined in claim 1 wherein the antidisturbance means comprises a plurality of trembler switches capable of firing a properly biased silicon controlled rectifier which will detonate the fuse.
 4. The fuse of claim 1 wherein said testing means comprises a capacitor, a silicon controlled rectifier, and a lamp. 